High Quality Content by WIKIPEDIA articles! The Blaster Beam is a concept electronic musical instrument consisting of a 12 to 18-foot (5.5 m) long metal beam strung with numerous tensed wires under which are mounted electric guitar pickups which can be moved to alter the sound produced. The instrument is played by striking or plucking the strings with fingers, sticks, pipes or even large objects such as artillery shell casings. The instrument produces a very distinctive bass tone, the sound of which is often described as `dark` or `sinister`.